// patterns/trash/ParseTrash.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Open a file and parse its contents into
// Trash objects, placing each into a List
// {java patterns.trash.ParseTrash}
package trash;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;

public class ParseTrash {
    public static <T extends Trash> void
    fillBin(String pckg, Fillable<T> bin) {
        try {
            Files.lines(Paths.get("trash", "Trash.dat"))
                    // Remove empty lines and comment lines:
                    .filter(line -> line.trim().length() != 0)
                    .filter(line -> !line.startsWith("//"))
                    .forEach(line -> {
                        String type = "patterns." + pckg + "." +
                                line.substring(
                                        0, line.indexOf(':')).trim();
                        double weight = Double.valueOf(
                                line.substring(line.indexOf(':') + 1)
                                        .trim());
                        bin.addTrash(Trash.factory(
                                new Trash.Info(type, weight)));
                    });
        } catch (IOException |
                NumberFormatException |
                Trash.TrashClassNotFoundException |
                Trash.CannotCreateTrashException e) {
            throw new RuntimeException(e);
        }
    }

    // Special case to handle List:
    public static <T extends Trash> void
    fillBin(String pckg, List<T> bin) {
        fillBin(pckg, new FillableList<>(bin));
    }

    // Basic test:
    public static void main(String[] args) {
        List<Trash> t = new ArrayList<>();
        fillBin("trash", t);
        t.forEach(System.out::println);
    }
}
/* Output:
Loading patterns.trash.Glass
Loading patterns.trash.Paper
Loading patterns.trash.Aluminum
Loading patterns.trash.Cardboard
patterns.trash.Glass w:54.0 v:0.23
patterns.trash.Paper w:22.0 v:0.10
patterns.trash.Paper w:11.0 v:0.10
patterns.trash.Glass w:17.0 v:0.23
patterns.trash.Aluminum w:89.0 v:1.67
patterns.trash.Paper w:88.0 v:0.10
patterns.trash.Aluminum w:76.0 v:1.67
patterns.trash.Cardboard w:96.0 v:0.23
patterns.trash.Aluminum w:25.0 v:1.67
patterns.trash.Aluminum w:34.0 v:1.67
patterns.trash.Glass w:11.0 v:0.23
patterns.trash.Glass w:68.0 v:0.23
patterns.trash.Glass w:43.0 v:0.23
patterns.trash.Aluminum w:27.0 v:1.67
patterns.trash.Cardboard w:44.0 v:0.23
patterns.trash.Aluminum w:18.0 v:1.67
patterns.trash.Paper w:91.0 v:0.10
patterns.trash.Glass w:63.0 v:0.23
patterns.trash.Glass w:50.0 v:0.23
patterns.trash.Glass w:80.0 v:0.23
patterns.trash.Aluminum w:81.0 v:1.67
patterns.trash.Cardboard w:12.0 v:0.23
patterns.trash.Glass w:12.0 v:0.23
patterns.trash.Glass w:54.0 v:0.23
patterns.trash.Aluminum w:36.0 v:1.67
patterns.trash.Aluminum w:93.0 v:1.67
patterns.trash.Glass w:93.0 v:0.23
patterns.trash.Paper w:80.0 v:0.10
patterns.trash.Glass w:36.0 v:0.23
patterns.trash.Glass w:12.0 v:0.23
patterns.trash.Glass w:60.0 v:0.23
patterns.trash.Paper w:66.0 v:0.10
patterns.trash.Aluminum w:36.0 v:1.67
patterns.trash.Cardboard w:22.0 v:0.23
*/
